Speaking of his royal half-sister, Markle Jr gushed that he had fond memories of Meghan from when he lived with Markle Sr and Doria Ragland for a few years after Meghan was born, saying she always had a "happy and outgoing personality" and was "always a princess and never a tomboy."

It's a dramatic shift in tone from Markle Jr, who wrote an open letter to Prince Harry weeks before the royal the wedding describing Meghan as a "jaded, shallow, conceited woman that will make a joke of you and the royal family heritage."

Prince Harry and Meghan, pictured in London on February 12, are expecting their first child in April. Picture: Getty

In the new interview, Markle Jr admitted the way he, Samantha and other members of the family "badmouthed" Meghan probably drove her away.

Last month, Markle Jr was arrested for driving while drunk. According to Fox News, he had a blood-alcohol level of .11% and was "visibly intoxicated" when police pulled him over.